Spline Component performance


I have problem. When i create actor which contains spline component, and create few spline points inside the editor. When i move one of the point, performance starts to be really bad. I have gtx 1080, i5 processor 4hz and 8gb of ram. Also i disabled collision from that road mesh. Yeah added road mesh which is only like 30 vertices. So what you suggest, i would use landscape splines but i want to have junctions. Which is kind hard with landscape.